Rinnai RL94I Flue Installation R98LSi, R98LSi-ASME, Air Intake Assembly, Exhaust Pipe Assembly

Flue Installation (R98LSi, R98LSi-ASME)

Air Intake Assembly 1

The air intake system consists of a field supplied 4 inch diameter stainless steel, Schedule 40 PVC, ABS or CPVC pipe. A maximum 6 feet of semi-rigid flexible aluminum ducting can also be used. Foil wrapped dryer vent and cell core products are not authorized.

2

The air intake has a zero clearance to combustibles.

Air Intake Connection		3	4
1.	Drill 2 small holes at the end of the air intake
	pipe.
2.	Slide the pipe over the air intake terminal.
3.	Using a level, ensure the pipe is straight up and
	down.
4.	With self tapping screws, attach the pipe to the air
	intake terminal.
5.	Apply a bead of silicone around the pipe and air
	intake terminal, ensuring an air tight connection.

Exhaust Pipe Assembly

Refer to the manufacturer’s installation instructions for the specific exhaust vent system.

Venting Clearances to Combustibles

	Enclosed	Unenclosed
Vent Size
	Horizontal &	Horizontal &
4" (102 mm)	4" (102 mm)	1" (26 mm)

Horizontal Terminations

The air intake must be located in relation to the exhaust as shown below. The air intake must angle 1/4 inch per foot to the termination to prevent entry of rain.

6”
Vent
8”
Optional
Intake	EXHAUST
Intake	COMBUSTION AIR /
	INTAKE
	SLOPE INTAKE AND EXHAUST
The vent termination and air	TOWARD OUTSIDE TERMINATION
	MINIMUM 1/4" PER FOOT
intake must be in the same
pressure zone and face the
same direction.

32 VB Series Indoor LS Manual